The above graphic is the seal of Side Blown Technologies. It is composed of two Chinese characters. The first one on the left means sideway, the one on the right means blow, as in blowing air. Like a rubber stamp, the seal is usually used as a signature at the end of a letter or as part of a chinese ink painting. It is made of stone and comes in many colors, sizes, shapes, forms and levels of carving details. The ink used is usually red.
The flutes I make are mostly of the side blown variety since my main instrument is the Boehm flute.